JPS5764392A - Semiconductor integrated circuit - Google Patents
Semiconductor integrated circuitInfo
- Publication number
- JPS5764392A JPS5764392A JP13947280A JP13947280A JPS5764392A JP S5764392 A JPS5764392 A JP S5764392A JP 13947280 A JP13947280 A JP 13947280A JP 13947280 A JP13947280 A JP 13947280A JP S5764392 A JPS5764392 A JP S5764392A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- potential
- terminal
- input
- connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C17/00—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards
- G11C17/14—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM
- G11C17/18—Auxiliary circuits, e.g. for writing into memory
Abstract
PURPOSE:To shorten a switching time, by constituting a circuit so that a comparator circuit for detecting connection or non-connection of a memory part, and a temperature characteristic of reference voltage of this circuit are made to correspond to a temperature characteristic of an input ''L'' signal, and also providing a circuit for clamping an input ''H'' signal. CONSTITUTION:The reference bias to be applied to a terminal 27b of a comparator circuit 27 for detecting connection or non-connection of a memory part of a fuse type bipolar PROM is almost equal to the ''L'' potential of an output signal of an internal output terminal 6, and its potential becomes high by decreasing or increasing values of resistances 28, 30 or a fuse 32. A DC noose margin is equal to the logical amplitude in an input of the circuit 27 which is required when an output terminal 5 is varied to the ''L'' potential from the ''H'' potential, by a difference between threshold voltage (=reference bias) of the circuit 27 and the ''L'' potential of an output of the terminal 6, and depends on the fuse 32, therefore, no temperature is changed. In case of the ''H'' potential of the terminal 6 at the time of a program, a clamping circuit 35 is turned on and off by a switch 36 in accordance with writing circuits 25, 37.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13947280A JPS5764392A (en) | 1980-10-03 | 1980-10-03 | Semiconductor integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13947280A JPS5764392A (en) | 1980-10-03 | 1980-10-03 | Semiconductor integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5764392A true JPS5764392A (en) | 1982-04-19 |
Family
ID=15246032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13947280A Pending JPS5764392A (en) | 1980-10-03 | 1980-10-03 | Semiconductor integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5764392A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5922296A (en) * | 1982-07-12 | 1984-02-04 | ロツクウエル・インタ−ナシヨナル・コ−ポレ−シヨン | Tracking rom driving and detecting circuit |
| JPS60201598A (en) * | 1984-03-23 | 1985-10-12 | Fujitsu Ltd | Semiconductor integrated circuit |
-
1980
- 1980-10-03 JP JP13947280A patent/JPS5764392A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5922296A (en) * | 1982-07-12 | 1984-02-04 | ロツクウエル・インタ−ナシヨナル・コ−ポレ−シヨン | Tracking rom driving and detecting circuit |
| JPS6237470B2 (en) * | 1982-07-12 | 1987-08-12 | Rockwell International Corp | |
| JPS60201598A (en) * | 1984-03-23 | 1985-10-12 | Fujitsu Ltd | Semiconductor integrated circuit |
| JPH0222479B2 (en) * | 1984-03-23 | 1990-05-18 | Fujitsu Ltd |
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